<!DOCTYPE html>
<html lang="zh">
<head>
	<meta charset="UTF-8">
	<title>背景图片 课上在</title>
</head>
<style>
	div{
		width: 1000px;
		height: 900px;
		background: url(ssss.webp);
		background-repeat: no-repeat;
		background-attachment: fixed;
	}
	h3{
		position: fixed;
		top: 30%;
		left: 10%;
	}
</style>
<body>
	<div></div>
	<h1></h1>
	<div></div>
	<h3>请 滚动试试看！</h3>
</body>
</html>